112 lines
2.1 KiB
C
112 lines
2.1 KiB
C
/**
|
|
* See Copyright Notice in picrin.h
|
|
*/
|
|
|
|
#include "picrin.h"
|
|
|
|
static pic_sym *
|
|
pic_make_symbol(pic_state *pic, pic_str *str)
|
|
{
|
|
pic_sym *sym;
|
|
|
|
sym = (pic_sym *)pic_obj_alloc(pic, sizeof(struct pic_symbol), PIC_TT_SYMBOL);
|
|
sym->str = str;
|
|
return sym;
|
|
}
|
|
|
|
pic_sym *
|
|
pic_intern(pic_state *pic, pic_str *str)
|
|
{
|
|
xh_entry *e;
|
|
pic_sym *sym;
|
|
char *cstr;
|
|
|
|
e = xh_get_str(&pic->syms, pic_str_cstr(pic, str));
|
|
if (e) {
|
|
sym = xh_val(e, pic_sym *);
|
|
pic_gc_protect(pic, pic_obj_value(sym));
|
|
return sym;
|
|
}
|
|
|
|
cstr = pic_malloc(pic, pic_str_len(str) + 1);
|
|
strcpy(cstr, pic_str_cstr(pic, str));
|
|
|
|
sym = pic_make_symbol(pic, str);
|
|
xh_put_str(&pic->syms, cstr, &sym);
|
|
return sym;
|
|
}
|
|
|
|
pic_sym *
|
|
pic_intern_cstr(pic_state *pic, const char *str)
|
|
{
|
|
return pic_intern(pic, pic_make_str(pic, str, strlen(str)));
|
|
}
|
|
|
|
const char *
|
|
pic_symbol_name(pic_state *pic, pic_sym *sym)
|
|
{
|
|
return pic_str_cstr(pic, sym->str);
|
|
}
|
|
|
|
static pic_value
|
|
pic_symbol_symbol_p(pic_state *pic)
|
|
{
|
|
pic_value v;
|
|
|
|
pic_get_args(pic, "o", &v);
|
|
|
|
return pic_bool_value(pic_sym_p(v));
|
|
}
|
|
|
|
static pic_value
|
|
pic_symbol_symbol_eq_p(pic_state *pic)
|
|
{
|
|
size_t argc, i;
|
|
pic_value *argv;
|
|
|
|
pic_get_args(pic, "*", &argc, &argv);
|
|
|
|
for (i = 0; i < argc; ++i) {
|
|
if (! pic_sym_p(argv[i])) {
|
|
return pic_false_value();
|
|
}
|
|
if (! pic_eq_p(argv[i], argv[0])) {
|
|
return pic_false_value();
|
|
}
|
|
}
|
|
return pic_true_value();
|
|
}
|
|
|
|
static pic_value
|
|
pic_symbol_symbol_to_string(pic_state *pic)
|
|
{
|
|
pic_sym *sym;
|
|
|
|
pic_get_args(pic, "m", &sym);
|
|
|
|
return pic_obj_value(sym->str);
|
|
}
|
|
|
|
static pic_value
|
|
pic_symbol_string_to_symbol(pic_state *pic)
|
|
{
|
|
pic_str *str;
|
|
|
|
pic_get_args(pic, "s", &str);
|
|
|
|
return pic_obj_value(pic_intern(pic, str));
|
|
}
|
|
|
|
void
|
|
pic_init_symbol(pic_state *pic)
|
|
{
|
|
void pic_defun_vm(pic_state *, const char *, pic_sym *, pic_func_t);
|
|
|
|
pic_defun_vm(pic, "symbol?", pic->uSYMBOLP, pic_symbol_symbol_p);
|
|
|
|
pic_defun(pic, "symbol->string", pic_symbol_symbol_to_string);
|
|
pic_defun(pic, "string->symbol", pic_symbol_string_to_symbol);
|
|
|
|
pic_defun(pic, "symbol=?", pic_symbol_symbol_eq_p);
|
|
}
|